wppaste
WordPress

wp_get_sidebar( string $id ): array|null

Since
5.9.0
Source
wp-includes/widgets.php:1066
Retrieves the registered sidebar with the given ID.

Compatibility

WordPress
since 5.9.0
PHP
7.4–8.6-dev
  • 6.7.7
  • 6.8.8
  • 6.9.7
  • 7.0.4
  • 7.1.0

Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.

Parameters

$idstring
The sidebar ID.

Return value

array|null
The discovered sidebar, or null if it is not registered.

Performance profile

How much work a call to wp_get_sidebar() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.

Cost class
Light

Touches nothing outside its own arguments.

Scaling
Scales with input

The body loops, so the work grows with what you pass in.

Instructions
8–14

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 20.

Plugin surface
None

Nothing here hands control to plugin code.

Called by
2

2 places in core call this, so the cost is paid more often than your own code shows.

What one call costs · 2 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost wp_get_sidebar() can have, taken from its control-flow graph on PHP 8.5.

WhenInstructionsCalls it makes
always8–10none
$id === "wp_inactive_widgets"13–14__()

Across PHP versions

Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 20 instructions, 8–14 executed per call, 4 branches. The work does not change between versions.

An instruction is not a fixed amount of time, so a matching count is not necessarily the same speed; what it rules out is a difference in the work itself.

Uses · 1

  • __()Retrieves the translation of $text.

Used by · 2

Source code

View on Trac View on GitHub 

function wp_get_sidebar( $id ) {	global $wp_registered_sidebars; 	foreach ( (array) $wp_registered_sidebars as $sidebar ) {		if ( $sidebar['id'] === $id ) {			return $sidebar;		}	} 	if ( 'wp_inactive_widgets' === $id ) {		return array(			'id'   => 'wp_inactive_widgets',			'name' => __( 'Inactive widgets' ),		);	} 	return null;}

Changelog

Introduced in 5.9.0. Unchanged from 6.7.7 through 7.1.0.

  1. 6.7.7
  2. 6.8.8
  3. 6.9.7
  4. 7.0.4
  5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

About this page

Parsed data
Generated from the wordpress-develop 7.1.0 tag, from src/wp-includes/widgets.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
Corrections
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